<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
   <a href=""></a> 
   <script>
       let a = document.querySelector("a")
       let username = localStorage.getItem("username");
       console.log(username);
       if(username){
           a.innerText = username
       }
   </script>
</body>
</html>